EWC Controls MA-ND4 User Manual
Forced Air Zone Controls
MODEL ND Series Dampers
ConstructionHeavy Duty extruded aluminum.
Nylon Bearings for quiet operation.
Overlapping parallel blades for low leakage.
Power open/Power closed.
Designed to operate at static pressures up to 1.5”
w/ less than 5% Leakage.
UL Listed Motor Actuator is a 24vac 3 wire power
open/ power close type rated at 18”lbs. of torque.
NEMA1 Rated Housing.
End-Stops for Min/Max Travel Adjustments.
LED’s Indicate damper position.
®
SUBMITTAL SHEET
Model ND
w/ MA-ND4 Actuator
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Available in 8" x 6" thru 30" x 30" in one inch
increments. Custom Sizes can be manufactured,
contact EWC Controls Inc.
END STOP ADJUSTMENT
-LOOSEN PHILIPS
HEAD SCREW
-MOVE END-STOP
TO DESIRED POSITION
-TIGHTEN PHILIPS
HEAD SCREW
0 1
Listed Size Less 3/16
0 1
Excellence Without Comprimise
wC
E
CONTROLS INC.
MA-ND4
24 VAC 50/60Hz 1.5VA 1W
18 in-lb (2Nm) 35s
MANUAL
GEAR
Class2
!
Supply
OPEN
PCPOCOM
CLOSED
1 4 6
6"
DIMENSIONAL
DRAWINGS
COM
PO
PC
4"
Listed Size Less 3/16
Positional Indicator
not attached for clarity
Excellence Without Compromis
E
W
CONTROLS INC.
SUBMITTAL FORM
e
385 Hwy. 33
Englishtown, NJ 07726
Ph: 800-446-3110
Fx: 732-446-5362
P/N 090377A0071 REV. L
Copyright © EWC Controls 2005-2008 All Rights Reserved
SUBMITTED BY:
JOB:
ARCHITECT:
ENGINEER:
CONTRACTOR:
LOCATION:
®
INSTALLATION DATA
Forced Air Zone Controls
Insertion Mounting
Cut a 4” slotted opening in one side of the duct and slide the damper in. Secure the damper to the
duct with the supplied sheet metal screws. Larger sizes may require additional support by securing the
back of the damper as well. If using duct board, additional support can be obtained by using Model
DBA Duct Board Adaptors.
*If flush wall mounting is required, cut the flanges off of the front mounting plate.
WIRING SOLUTIONS
MOTOR Terminal Output
M6 - Power to Close (PC)
M4 - Power to Open (PO)
M2 - Constant Power (HOT)
M1 - Common (COM)
Wiring to a Control Panel
M6
M4
Model ND
w/ MA-ND4 Actuator
Wiring a Thermostat to Control a Single Damper
FAN
SYSTEM
OFF HEAT
ON
COOL
AUTO
EWT THERMOSTAT
w/TSB-M SUB-BASE
EQUIVALENT
R1 RELAY SPDT
w/24VAC COIL
or
EQUIVALENT
TRANSFORMER
24VAC, T-40VA
or
EQUIVALENT
H
C
Conventional
Thermostat
GYW R
JUMPER
or
M2
M1
M6
M4
M2
M1
6-PC
4-PO
1-COM
Wiring in Parallel
NO CONNECTION
6-PC
4-PO
Motor
1-COM
Motor
COM-1
PO-4
PC-6
Motor
6-PC
4-PO
1-COM
Motor
6-PC
4-PO
1-COM
Motor
Excellence Without Compromis
E
W
CONTROLS INC.
e
385 Hwy. 33
Englishtown, NJ 07726
Ph: 800-446-3110
Fx: 732-446-5362
P/N 090377A0071 REV. L
Copyright © EWC Controls 2005-2008 All Rights Reserved
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